Automatic musical instrument.



J. O, HAGEY.

AUTOMATIC MUSICAL INSTRUMENT.

APPLICATION FILED SEPT.27,1905' 955,869; Patented Apr. 26, 1910.

3 SHEETS-SHEET 1.

mew 7 J. C. HAGEY.

AUTOMATIC MUSICAL INSTRUMENT.

APPLIGATION FILED SEPT.27,1905.

Patented Apr. 26, 1910.

3 SHEETSSHEET 2.

Ow II [rave/c607" James a is! I'll l wa J. G. HAGBY,

AUTOMATIC MUSICAL INSTRUMENT.

APPLICATION FILED SEPT.27,1905.

Patented Apr. 26, 1910.

3 SHEETS-SHEET '3.

D M "my /Tw 6 t 0 5 I A 0 3 MW. f @v. a M M T 40, 3 w Fll $x M% 4 To all uihom' it may concern: f r

Be it known that I, James G. Haenna 'l relative to each other. citizen of the United States, residing at Bos- N TED STATES TENT OFFICE.

umisc. linear, or BOSTON, mnssacnosn'rrs, AssIGNoR or ONE-HALF 'ro "rnn CABLE comramr, or CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

'AUTOlllATIC .MUsroAL Insrrtmvxnncr.v

Application filed September 2 7, 1905. Serial No. 280,274,

ton. county of Suli'olk, and State of-hlassa I chusetts, haveinvented an Improyement in Automatic Musical Instruments, of-which the following description, in connection with the accompanymg drawing, is a spec1fica-' .tlon, like characters on the drawings representing like'parts.

This invention relates to mechanisms that are operated by a perforated controlling 7 sheet, such, forinstance, as automatic innsiealinstruments, and has special relation to, the traeker-boardthereof, one of the-objects of,v the invention being to prov de a n o ve1 means for {expanding and contracting the tracker-board to correspond with variations in the width of the perforated sheet; another objectrbeingfto provide, novel -means for shifting the position .of the: tracker-board longitudinally to bring "it into proper. alinement with, the perforated sheet-traveling thereover; another object being to provide an automatically expansible tracker-board which hasuniformly spacedducts either in its expanded or contracted posit-ion or. in any intermedia e position; and still anotherobject bein to provide a tracker-board such-as above re erred to which can be used with the ordinary perforated controlling sheet. In the preferred embodiment of my invention this control of the tracker-board both as to its length and as to its position is obtained automatically by or through the perforated sheet, the mechanism being so constructed that whenever the perforated sheet. expands or contracts owing to changes in the humid -1ty ofthe atmosphere, such expandingor contracting sets in motlon automatleally themechanisni' for expanding or contracting the tracker-board to make it correspond 111 length with the width of the sheet, and whenever the sheet and the tracker-board get shiftedlaterally with resp'ectio each other so that the perforations in the sheet do not register exactly with the: ducts .of the tracker-board, said mechanism-is brought into action to cause'a relative lateralmo'vement between the tracker-board and the sheet, thercby to bring them into their correct position relatively lo'eacli other. The necessary ex )tlllhlOIl and contractionbf the tracker-boar is preferably, obtained by Specification of Letters Patent.

are of uniform w 1 Patented Apr. 26, 1910.

each section has one duct only the duets throughout the length of the tracker-board are uniformly spaced becausethe sections 'dth, and one feature of my invention is providing suitable means for maintaining t is uniformity of spacing of the ducts throughout the length of the tracker-board while the latter is being adjusted. This is an important feature of the invention because it' obviates the necessity of specially perforating the music sheet to cooperate. with the tracker-board. The sections may be adjusted either by hand or 1111- toma tica l y, though I prefer to employ automatic means for accomplishing this, which 7 means 18 controlled by the covering or an i sponding end thereof. If,however,- the sheet expands in width for any reason, it will cover up the outside apertures and thereby set in motion the mechanism for expanding .covering by the perforated sheet of auxili'ary ducts. I have shown. two suchducts or the tracker-board. If, on the other hand, the I perforated sheet contracts in width, it will uncover the inside apertures at. each end and thereby set in operation the mechanism for contracting the tracker-board. The means for shifting the tracker-boa rd laterally is also preferably automatically controlledby the erforated sheet, and is so constructed that if the tracker-board is shifted laterally with reference to the perforated sheet so that both apertures at one end thereof are covered by the sheet and those at the. other end uncovfeted, the mechanism for shifting the trackerboard laterally with reference to the perforated sheet to restore the two to their normal relative position is automatically set in ,op-, 'eration.

It will he noted that the means for ex panding and contracting the tracker-board,

and also for shifting it laterally is eon trolled as to its operation b :the position of pose is necessary. My improved tracker-board may be used the edge of the perforated s "e et, and that no special perforation ofthe sheet'for this purally the mechanism for adjusting,"expandtracker-board; Fig. at \is a section on the' ing and contractingthe tracker-board; Fig. 2 is a side view of Fig. 1;'Fi 3 is a detailed view on an enlarged scale 0 one end of the line ar-w, Fig. 3; Fig. 4: is a section on the line wa2, Fig. 4; Fig. 5 is a section through thevalve mechanism by which the expanding and contracting and adjusting mechanism is controlled, said section being taken on substantially the line 3 -y, Fig. 2; Fig. 6 is a section on the line a-a, Fig. 5; Fig. 7 is a section on the line b-b, .Fig. 5; Fig. 8 is a section on the line 0-0, Fig. 5; Fig. 9 is a: plan view of the partsbelow 9n the line dcl,Fig. 2; Fig; 10 is a sectiononl' line'ee, Fig. 9; Fig. llis a section on the line ff, Fig. 10; Fig. 12 is a detail to be referred to, and Fig. 13 is a detail showing a tracker-board embodying my invention in which each section thereof has one duct only therein.

The tracker-board is designated generally by 3, and in the embodiment of my invention herein shown, it is made in sections from the other sections and to adjust them.

which can be moved relativeto each other.

These sections are designated by 4 and I prefer to make each section independent to expand or contractthe tracker-board by a suitable cam mechanism so that the umformity of the spacing of the sections will be maintained in every adjusted position.

While a tracker-board embodying my invention may be made of any suitable material and of any desired shape, I prefer to use metal and to so construct it that it will comprise a metallic face-plate over which the perforated sheet passes, and which is provided with apertures 6 communicating with ducts? leading to the usual pneumatics The facefor operating .the instrument. plate of the tracker-board. is herein shown as having secured to the back side thereof in alinement with each a pcrture a metallic stem or neck 8 to which aflexible tubing, constituting the duct 7, is secured. The metallic face-plate is shown as being carried and supported by suitable rods 9.

As stated above, the tracker-board is made I in .sections, the sections being made by dividing the face-plate into the sections 4, each section having its'edges curved, as at 10,

to partiall embrace the rods 9. ihS herein constructet the rods 9 also constitute the cams for adjusting the various sections 4,

one simple wayof accomplishing this being to provide each rod adjacent each section with -a cam-groove ll intowhich a projectionor finger 12 on the section enters, so that as the rods are turned in one direction or the other, the sections are advanced ion gitudinally of the rods; The sections 4 may each have one duct, only therein, as shown in Fig. 13, or ea-ch may have a plurality of ducts therein. The special ad.- vantage gained by making each section with .asingle duct, as in Fig. 13, is that the ducts may be arranged according to the regularscale commonly used in tracker-boards for. ordinary piano-players, and it will be un: necessary to specially cut-or perforate the controlling sheet. i In order. to securethe roper alinement of the ductsin. the tracker-board with the. perforations in the sheet under all conditions, it is necessary to maintain the uniform spac- 'ing of the sections in all adjusted"posit1ons, for although the controlling sheet may expand or contract yet'in everyjcondition of it the perforations therein mamtain their. uniformit'y' of spacing. I n order to maintain this uniformity IOf'spacinfi-ofthe sections it is necessary to move or a ust-those neartheends of the tracker boardfto' a greater extent" than those adj aeent themiddle of the tracker- .board. 1 This is accomplishedtb "making-:

difierentthe different cam grooves-".1 1 go pitch, the cam grooves for moving theisections adjacent the neutral line of the tracker board having a slight pitch, and those at the end having aimuchgreater pitch; the cam grooves having a progressively increasing pitch as they a roach the ends of the tracker -board. ith this arrangement it. willbe observed that as the rods 9 are turned the uniform spacing of the sections is maintained in every adjustedv position of the tracker-board. I regard this feature of my I invention as of some importance, because the desired expansion and contraction of the tracker-board mayv besecured without resorting to the use of any specially perforated controlling sheet. The rods 9 may beturned'to extend or contract the tracker-board either manually or. automatically. I have herein shown'115 means for operatingsaid rods in both of these ways. The two rods 9 are geared together so that the rotate in unison but oppositely. As herein shown both of said rods are operated by-an actuator which can conveniently be in the form of a double rack 13' which meshes with a pinion 14 on each rod. The rods may be manually operated either by reciprocating the rack 13bor by turning one of the rods by any suita 1e means such as by a thumb-piece on'the end of one or both rods. .F or automatically extending or contract- V able means for o crating the rack-bar 13 in one direction or t e other. As herein shown the rack-bar is connected to a bell crank lever 15 which is connected by a suitable link 16 with a double power-pneumatic 17. This double pneumatic comprises ttQCQIlUHl movable partition 18 to which the link 16 is attached, said partition dividing the interior of-the pneumatic into two exhaust chambers 19 and 20. These exhaust chambers are controlled by suitable valve mechanisms which will be more fully hereinafter described. With this construction it will'be seen that when the exhaust-chamber 19 is exhausted the partition 18 will move to the left, Figs.

' be adjuste I H thus movin these-rods laterally,I have pro- 2 and 10, and thereby expand the trackerboard; while when the exhaust-chamber 20 is exhausted, said partition will move to the ri ht, thereby contracting .the tracker-board." 3efore describing the valve mechanism for operatin the expanding and contracting device, I will refer tothe means for adjusting the tracker-board as a whole longitudinally, thereby to bring the neutral line thereof 1n alinement' with the neutral line of the perforated sheet. I

The rods 9' of the tracker-board are slidably mounted in suitable bearings 21 so that 'by moving said rods bodily in the direction of theii' length, the entire tracker-board may transversely to-,.the ,sheet." [F.or

vided an a justin lever 22 which is' suitably pivoted at 24, and. 4

ooves'23 in the'ends of the rods 9. Said ever is connected by a suitablelink 25 to the central partition 26 ofanothcr double powerpneumatic 27, said pneumaticpomprisl11g the.

two exhaust-chambers 28 and 29wvhich are separated by the.partition 26. \Vhcn the chamber 29 is-exhaustcd, the partition 26 will move to the left, Fig. 1, thereby moving the tracker-board bodily to the right, and when' the chamber 28 is exhausted, the

tracker-board is moved bodily to the left.

In the preferred cmbodiment'of my invention which is herein illustrated, the exhaus tion of the chambers of the two double 'powerneumatics is controlled by the per forate sheet, thus making the adjustment of the trackerboard entirely automatic.

.Moreover, this is accomplished without the end section of the tracker-board with a pair of apertures, the apertures atone end being I designated 30'and 31, and the apertures-at the'other end being-designated 32 and 33-. The ducts or conduits 34 from these aper-' tures lead to a suitable,valve mechanismg l" best seen in Figs. 5, 6, 7 and 8, by means.o

.: which the powerneumatics are controlled.

oneend of which enters,

the ducts of each pair, as'indicated by dotted lines in Fig. 1 so that the apertures 31 and 32 are'closed by'the sheet, and the apertures 30 and 33 are opened to the atmosphere. To avoid confusion, I will refer to the aperture 31' as the left-hand inside aperture, the aperture 32 as the right-hand inside aperture, the aperture 30 as the lefthand outside aperture, and the aperture 33 as the right-hand outside a pcrture, the'terms inside and outside being used to indicate the'normal position of the apertures with reference to the edge of the sheet. The duct or conduit from the right-hand outside aperture 33 leads to a pneumatic chamber 35, the diaphragm of which has connected thereto two valves 36 and 37. 'lheduct communicating with the left-handoutside aperture 30 leads to a pneumatic chamber 38,.the diaphragm of which is connected to two valves 39 and 40. The duct commun'ieating. with the right-hand inside aperture 32 leads to a pneumatic chamber 41, the dia- 43, the diaphragm of which is connected by a suitable valve-stem with two valves 44 and 45. The space 46 above'the diaphragms of the pneumatic chambers 35 and 41 is connected to a suitable suction apparatus, and is also connected by a suitable duct 47 with the space 48 above the diaphragms of the pneumatic chambers 38 and 43. The space 49.communicat'cs with the atmosphere.

Theexhaust-chamber 2!) of the powerpneumatic 27 communicates by means of a port 50 and a conduit 51 with the space 52 above the valve 40, and the (5Xl lilllSt-Cllflltlb0l '28 of said power-pneumatic communicates bya suitable .poi't53 and a conduit 54 with the valve-chan'ibcr 55 in which the valve 44: plays. The cxlumst-chamber 19 of the powempncumatic 17 communicates by means of a suitable port 51) and a conduitb? with thevalve chamber 58 in which the valve 3!) plays, and-the exhalist-chamber 20 0f said .As herein shown I have provided each power-pneumatic l7 cmmnunicatcs by a port 59 an a conduit (30 with the valve-chamber 61 in which the valve 45 plays.

62 designates a duct connecting the space between thetwo valves 36 and 37 to that between the valves 39 and 40; and 63 is another duct 'connecting the valvehainber v in which the valve 42operates to t e space between the valves 44 and 45. i

- tures' and 3.3.

The yalVes-andpnenmatics are shown in 1 1g. 0 1n theposltions theynorma-lly occupy when theperforated sheet is correct placed on the tracker-board, the inside apertures 31 and 32 being covered and consequentl the pneumatics-ll and 43 beingexhaustetl, it. being understood that thediaphrag ns of.

these pneumaticse ":11 have the usual bleed i that the perforated sheet has expanded in width sutheiently to cover the outside aper- When this occurs, comnuuncation' between the pneumatic chambers and 38 and the atmosphere is cut 'oh", and as the diaphragm's in thesepneu- I r 20.

I holes,'said chambers become exhausted and the diaphragms collapse. When this occurs,

matics-are provided with .the usual bleed- .the valve 37 closesand the valve 36 opens, and atthe same tune valve 39 opens and valve closes. The condmt 5715 thereby.

thrown into communication with the port in I I 30 tit! and the latter with theexhaust-chamber 46 with the result that the chamber 19 of thepower-pneumatic 17 begins to be exhausted and the partition 18 will move toward the left in Fig. 2; thus shifting the rack-bar 13 and turning the'rods or supports 9 to expand the tracker-board. As soon as the tracker-board has been sulficiently expanded so that the outside apertures 30 and 33 are carried beyond the edge of the sheet, air is admitted to'thc' pncumatic chambers 35 and 38 and the pneumatics thereof are infiateththus restoring the valves 36, 37 and 35), 40 to the position shown in Fig. 5 and connecting the chamher 1!) withthe atmosphere. As soon as'this occurs. the pressure on the partition 18' is balanced. there being atmospheric pressure in both chambers 1%) and 20; and the said partition, therefore. will remain in the position inwhich it has been carried by the partial exhaustion of the chamber 19-until another adjustment of-the tracker-board is needed.

pneun'iatic chambers 41 and 43, thereby expanding'said pneumatic chambers and lifting the valve 42 to open communicationlie-- tween the port 63 and the exhaust-chamber 36. and also closing the valve 44 and opening the valve When this occurs, the

conduit 69 is connected directly with the cxhaust-cluunber 46 and the chamber 20 of the power--pnemnatic 17 is partially exhausted thereby shiftingthe partition 18 to the right. Fig. 2. The movement. of-said partition in this direction operates'through the connections above described to contract- If, on the other hand, the sheet- 'contracts in width so as to uncover the in.-

sule apertures, air will be admitted to the.

right, Fig. l.

where 'it will remain until-further a'djust- I 7' ment of the tracker-board is needed; If the tracker-hoard is, for any reason, shifted to the' left sufli'ci ently sothat the controlling sheet covers the right-hand outside-aperture; 3-3,the' left-hand outside aperture 30 remaining uncovered, the pneumatic chamber 35 will become exhausted and the exluiust-cluuuber 4(iwill be connected through the port or duct 62 with a conduit 51 leading to the chamber 29 of the iower-pneumaticZT. The partition it: will then have less pressure on' one .sidethan' on the other. and said partitionwill move'to-the left, Fig.

1, thereby shifting the tracker-board bodily to the right unti the right-hand aperture 33 is'uncovered again. ,As soon as said right-hand aperture is uncovered. the partition 26 is again placed in equilibriumand itwill remam in the position in which it has been moved by the partial exhaustion of thechamberQS) until the tracker-board needs further adjusting. If. on the other hand, the tl'tlt'litl' bOtlld should beshifted to the right with reference. to the controll sheet-- sulticiently so that the inside'rigl'.t -hand aperture 32 were uncovered, then the pneu matic 41 would be expanded and the .conduit 54 leading to the chamber 12h of the powerpneumatic would be connected with the exhaust chamber 46. thus again placing an nn-' even pr'essureon the two sides of the partition 26 and causing the latter to move to the This movement of the pa ti-. tion moves the tracker-board bodily .to the leftto-restore it to the normal position am as soon as this occurs, the partition 26 is again placed in u uilibriumj ioo 'lhearrangement-of the pneumatics above described, is such that the tracker-board may always be brought back into its correct position. either by expanding or contracting it or moving it bodily and it'will be kept in such position and condition without any hand manipulation.

It will be obvious that the rods S) and consequently the tracker-board may be shifted laterally by hand. My invention is not limited to the use of automatic device to a just the length of the traclwr-bmlrd or to such a device to shiftit laterally of the, perforated sheet, but I prefer to employ such automatic means. \Vhetr the automatic means are employed, it is of advantage to have-the tracker-board arranged for manual adjustuu-nt also so that in case the automatic. means fails to act for any reason, the proper adjustment can be made manually.

It is also of advantage to be able to manually adjust the tracker boa'rd before operating the instrument. A

I believe that I am the first to provide'an expansible and contractible tracker-board in which the ducts are uniformly spaced .in

every adjusted position of the-tracker-board with means for automatically securing: the

expans on or contraction of the trackerboard. I am aware that this expansion may be obtainedby various methods through the use of diiferent .n echanical movements, and -'I do=not desire to limit myself to the par-. -ticular mechanism shown io'robtaining this- -propor tiona'te 'iiidivi'dualadjustment of the sections of the tracker-board. i

Vhile the invention has been especiallydesigned for use in connection. withmusical instruments, yet it maybe embodied in an machine in whichperforated sheets trave ing over a tracker-board-are employed for controlling or operating certain mechanisms;

I Having fully described my invention,what

I claim as new and desire to secure by Letters-Patent, is

1. Ina device of the class described, a

transversely-divided tracker-board having, a" plurality of independent sections on-each side of the center thereof and means toadg'ust all sections ofthe tracker-board. rela 'tive to each other simultaneously'and togive the outside or end sections a greater movement than the central sections. i

2. Ina device of the class described, a-

' transversely-divided tracker-board having a plurality of independentsections on each side of the center thereof, a perforated controlling sheet passing across said trackerboard and means controlled by said sheetto adjust all the'sections relative to each other simultaneously, said means operating togive the outside or' end sections a greater ad-" justmcnt than the central sections.

3. In a device of the class described, a transversely-divided tracker-board having a plurality of independent sections on each' side of the center thereof, a perforatedcontrolling sheet arranged to pass across said tracker-board and automatic means controlled by said sheet to adjust said sections relative to each other, said means operating to move the sections a reater or less extent dependent upon the d1st1 nce thereof from the center of the tracker-board.

4:. In a device of the class described, a

tracker-board composed of a lurality of separate sections, a rotary sha t extending longitudinally of the tracker-board, connections between saidsha-ft and each section, said connections being such that rotation of the shaft moves certain of the sections in one direction and others of the sections in the opposite direction, a controlling sheet for" said tracker-board and automatic means .to rotate said s .other.

rendered o erative by expansion or contraction of sai controlling sheet to rotate said shaft'in one direction or the other.

5. In a device-of the class described, a tracker-board composed of a luralityof separate sections, a rotary sha t extending longitudinally of the tracker-board, connections between 'saidshaft'and' each section,

said connections being such that rotation of the shaft moves certain of the sections in one direction and others of the sections in the opposite direction,' a controlling sheet for said trackerboard and automatic means renderedbperative by expansion orcontraction of said controllin sheet but not affected by bodil latera movementthereof ldafirin onedirectio'n or the 6. In a deviceof the class described, a tracker-board formed of a plurality of sect ons .each having a projecting .finger, a shaft having a cam-groove for-each finger and f means to rotate the shaft.

r7. In adeviceof the class described, a

'tracker board 'formed'of a lurality of separate sections anda 'cam evi'ce to act on each section to mov'e'the same longitudinally of hetracker-board'. y

an a device'operable by a perforated controlling sheet of expansiblev and contractible material," a tracker-board formed of a" plurality. -of inde 'endent sections, cammechanism'to-move t e sections longitudinally of thetracker-board' thereby to expand or contraet'the length ofthe tracker-board and automatic (means to actuate said cam-' 'mechanism as the paper expands or contracts.

9. A tracker-board comprising two sup- Y porting rods and a perforated metallic faceplate supported by the rods, the edges of the ace-plate embracing the rods.

10; A tracker-board comprisin a i seetional metallic facelate provi ed with ertures, a pair of r0 s on which said facea plate is supported, the edges of the sections of the face-plate embracing the rods, and nipples secured to the back side of the faceplate -in ,alinement with the' apertures said apertures due to the expansion of the sheet.

12. A'perforated sheet, a tracker-board provided with apertures which are normally covered by the op osite edges of said sheet as it .travels over t ie tracker-board, a single tracker-board-contracting device and means travels over said normally-covered 111g normally uncovered to operate said tracker-board-contracting device thereby to contract the tracker'board. by

the-uncovering of said apertures due to the shrinking of the sheet.

In a device of the class described, a perforated sheet, an expansible and contractible tracker-board having at each end a air of apertures, one aperture of each pair ing norn'iall covered by' the sheet as it tracker-board and the other aperture of each pair being normally uncovered, and means set in operation by the covering or uncovering of said apertures dueperforated slieet,-anexpa1 1sible and contractible tracker-board having at each end a pan" of apertures, one aperture of each pair beand the other being normally covered by the perforated sheet as it'travels over the tracker-board, and means set in operation by impulses obtained by an covering. the normally-corered and covering the normally-uncovcrcd apertures to move the tracker-board laterally of 'the perforated sheet and to expand and contract. said tracker-board.

lt In an apparatus operable by a perturcs a perforated controlling sheet, a perforated controlling sheet. an expansible and contractiblc tracker-board and means controlled by said sheet to expand or. contract the trackerboard and also to shift. the tracker-[amid in the direction, of its length.

1T. ln a device'of the class described, an expansiblc and contractiblc trackcr-bm\rd, a perforated controlling sheet therefor, a. single pncunnitically operated device to expand or contract said tracker-board and means to' render said device operative by relative changes in the position of opposite edgcs of the sheet.

1h. In a device of the class described, an expansible and contractible tracker-board having ducts, movable supports therefor and means to effect aichangc in length of the tracker-board by movement of the supports.

19. In a device of the class described. a tracker-boarddivided into individual sections, supports for the sections of the trackcr-lmard and means to effect an indiidual adjustment of said sections relative 20. A tracker-board divided transversely into sections, rods or shafts on which said sections are supportedand means to adjust positively said sections individually relative to each other by said rods or shafts.

21. In adevice of the class described, a perforated controlling sheet, a tracker-board having at each end a pair of apertures, one aperture of each pair being normally uncovered and the other being normally covered by the perforated sheet as it travels over the tracker-board, and means set in operation by the covering of one of said apertures only to shift the tracker-board longitudinally sufiieiently to uncover said aperture.

22. In a device of the class described, a.

perforatedcontrolling sheet, a tracker-board having at each end a pair of apertures, one

aperture of each pair being normally uncovered and the other being normally covered by the perforated sheet as it travels over the tracker-board, and means set in operation by the uncovering of one only of the covered apertures to move the t'rackei board longitudinally.

the class described,- aperforated controlling sheet, a tracker-board having at each end a pair aperture of ea ch pair beingnormally'uncovered and the .other being normally covered by the perforated sheet as it travels over the tracker-board, and means ",set in operation by the covering 'aid uncovered apertures or by the uncover: ing of one only shift the traclu-r-lmard longitudinally.

El. The combination, with a tracker-board 23. In a device of divided trans\'ersel into sections, of means for adjusting said sections relatively to each other and means fo bodily shiftlng the tracker-board.

25. A tracker-litmrd provided with apertures and composed of a plurality of sec-' tions, a controlling sheet provided with rows of perforations arranged for registration with said apertures and means cont-rolledby said sheet for adjusting said sections relative'ly to each other, in combination with means for bodily shifting the tracker-board laterally of said sheet.

26. The combination,with a tracker-board, of means to effect longitudinal expansion and contraction thereof and means to impart a longitudinal bodily movement thereto.

27.. In -a device of the -class described, an expansible and contractible tracker-board, a perforated controlling" sheet therefor and means rendered operative by expansion or C(flltliHt'lOll of the controllingsheet for expanding or contracting. the tracker-board but notafi'ected by bodily lateral movement of said bpnctrolling sheet.

of the covered apertures to of apertures, one

of one only of-v 28. 1 11 a (levice of lthe class (lescribed, v In testimony whereof, I have signeil my expansible and contralctible tracker-board, a name to this specification,'-in the presence of- 10 perfoi'kted controlling sheet therefor. and two subscribing witnesses.

gendered operative by bodily lateral L JAMES C; HAGEY.

5 move ent ofthe controlling sheet to impart m a longitudinal bodily movement to the \Vitnesses:

tracker board irrespective of any expansion 'LOU1s G. SMITH, or coh'tr a d'ction in the controlling sheet. I I Riorm. W; Gown. 

